Macau

Macau, or Macao, is a special administrative Region of China. It is officially called the Macao Special Administrative Region of the People's Republic of China (MSAR), is a city and special administrative region of China in the western Pearl River Delta by the South China Sea. With a population of about 680,000 and an area of 32.9 km2 (12.7 sq mi), it is the most densely populated region in the world.

Etymology
mage 媽閣